I know that ISO files follow ISO-9660, the ISO in which stands for International Standards Organisation, but a lot of file formats will presumably follow some ISO standard, so that seems incorrect. My best guess so far is: Image Standard Optical.
Respondent The respondent is the party against whom a petition is filed, especially one on appeal. The respondent can be either the plaintiff or the defendant from the court below, as either party can appeal the decision thereby making themselves the petitioner and their adversary the respondent. Formerly, in the equity courts of common law, the defendant was always called the respondent. see also petitioner.
What do the words Petitioner and Respondent mean? In any legal case, the people involved are referred to by words that describe their role in the case. In a divorce case, the person who starts the court case by filing the Petition is called the Petitioner.